Gitlab-Runner Docker Build to Kubernetes - Cheat sheet

BUILD

• docker build -t gitlab-runner-dalom .

Push to Desktop docker "Registry" service

• docker tag gitlab-runner localhost:5000/gitlab-runner:1.08
• docker push localhost:5000/gitlab-runner:1.08

Push to docker.com Hub

docker tag gitlab-runner baudchaser/dalom-gitrunner:1.08 docker push baudchaser/dalom-gitrunner:1.08

Creating Secret on a private docker.com repository:

• "-n default" means "-n namespace"

Create a Kubernetes (on Master) credential secret:

• kubectl create secret docker-registry regcred --docker-username= --docker-password=<your_docker.com_hub_password> --docker-email=your@email.com -n default
• docker login -u

means the namespace you've given on docker.com Hub

• docker tag gitlab-runner /:gitlab-runner
• docker push /:gitlab-runner

Apply to Kubernetes Cluster (see git project for further explanation)

• kubectl apply -f .\gitlab-runner.yaml

If you want to check the build in docker and RUN it on a build machine

• docker run -it --entrypoint /bin/bash gitlab-runner

Kubernetes hints

• kubectl delete deployment gitlab-runner-dalom-deployment
• kubectl describe pods gitlab-runner-dalom-deployment-567f7685d6-ln8qp

Important files

• gitlab-runner-config.toml - Add your Gitlab Runner(s) secrets here)
• gitlab-runner.yaml - Kubernetes, apply with "kubectl apply -f gitlab-runner.yaml" on a master)
• Dockerfile (The build instructions for Docker.

A rather brutal Dockerfile.

• It goes against a lot of the principles behind Docker and Kubernetes, but in this case I chose to ignore that and simplify my life by wrapping all of whole build needs into one container with multiple layers. We mainly need PHP 8.3, NPM and Javascript-Obfuscator. The rest on the image is depencencies. This image is meant to be run behind closed walls, not in any way public. There are major security concerns having a full version of Ubuntu 22.04 available running with root privileges like this.

DO NOT build, install and run unless you know what you are doing.